the fbi isn't commenting on its investigation. but cnn has new information from tom fuentes who spoke to sources with knowledge of the probe. he says after kelley complained to an fbi agent about the harassing e-mails, agents from the bureau's cyber crime unit got a subpoena and got the internet service provider to give them information on who owned the account of the sender. >> what's the internet address they are being transmitted by. >> reporter: that likely would have been more than one internet address. news reports say paula broadwell, now known as the person sending harassing e-mails to kelley believed to send them from various places. depending on where the computer was plugged in, the sender would have different ip addresses. an expert on internet monitoring explains what the fbi likely did next. >> so what they did is they determined that she logged into this e-mail account from hotels around the country. and so they contacted the hotels and got the guest lists, the names of people who were staying at the hotels on those